JPS638800Y2 - - Google Patents

Description

[Detailed explanation of the invention] In conventional paper machines, when paper breaks at the start of operation or during normal operation, all rolls are rotated at a high operating speed and a thin wet paper (tail) is passed through the machine. is being carried out. FIG. 1 shows the tail passing portion of the dryer part that dries the wet paper from the press part that removes water from the wet paper.

In Fig. 1, the tail 9 sent from the wire part is transferred to the carrier jet 1 having an air nozzle.
0, the press part paper roll 3 and dryer roll 4 are peeled off from the press part paper roll 1.
Air is blown between the dryer roll 4 and the canvas 8 by blowing air from a tail shooter 13 having an air outlet provided therebetween. Further, the tail 9 transferred from the press part is stripped off by the dryer roll doctor 6 and falls downward as shown in 9b. Note that 5 is a doctor.

In such a situation, in order to advance the tail into the dryer part group, conventionally the tail had to be moved manually to be inserted between the two ropes 12 provided in the dryer part. I was getting used to it. Further, after the tail had passed through all the dry part groups and the reel, the nozzle cutter on the wire part was moved in the paper width direction to spread it to the entire width.

Now, between the press part and the dryer part, the air flowing along the blanket 7, canvas 8, dryer roll 4, etc. in FIG. It took a lot of time to move 9 from the press part to the dryer part. This tendency is more pronounced for lightweight paper and high-speed machines.

Furthermore, after the tail 9 was sandwiched between the dryer roll 4 and the canvas 8, the work of sandwiching the tail between the rope 12 had to be done manually by the worker, which was extremely dangerous work. .

The strength of the wet paper after pressing is weak, and the tail breaks easily, so considerable skill is required to pass the tail through quickly. Moreover, the higher the speed of the machine, the more paper breaks occur, and therefore the paper threading operation takes a considerable amount of time and increases the number of times. This situation caused workers to perform dangerous work for long periods of time, posing a safety and environmental problem.

In addition, if paper cannot be wound on the reel for a long time, the entire width of the paper other than the tail is dropped into the couch pit or press pit, and it is often the case that the machine has to stop because the collection capacity is exceeded. Ta.

This invention was proposed in order to eliminate the above-mentioned drawbacks of the conventional methods.It uses two upper and lower chute plates for transporting the tail, cuts air flow from surrounding felt, canvas, etc., and stably transports the canvas. and the tail between the dryer rolls,
It is an object of the present invention to provide a paper threading device for a paper machine that mechanizes the manual work of inserting the tail into a rope and quickly retreats after the tail is inserted into the rope to eliminate paper breakage. .

Embodiments of the present invention will be described below with reference to the drawings. Fig. 2 is a layout diagram of the paper passing device according to the invention, Fig. 3 is a component configuration diagram of the upper shutter of this device, Fig. 4 is an operation explanatory diagram, and Fig. 5 is a diagram illustrating the operation. The figure shows a detailed view of the case where the tail guide of the tail width adjustment device is rotated, and FIG. 6 shows an example of an air system diagram when this device is used. In addition, in FIGS. 2 to 6, the same parts as in FIG. 1 are indicated by the same reference numerals. In addition, since the numbers 1 to 12 in the figure are the same as in FIG. 1, their explanation will be omitted here.

Now, the difference between FIG. 2 and FIG. 1 is that an upper shooter 14 and a lower shooter 14' are provided, and each shooter is provided with two or more air blowing pipes 15a and 15b having air blowing holes. , the upper shooter 14 further includes a carrier jet 10 with an air nozzle and a tail width device 16.
is provided.

Next, in FIGS. 3 and 4, the tail width adjustment device 16 is composed of basic parts: a tail guide 17 for pinching the tail between the ropes 12, a compression spring 18, an air cylinder 19, and a parallel link 20. , the tail guide 17 has a parallel link 20
The paper is threaded from the rest position by deforming the parallel link 20 from a vertically long parallelogram to a horizontally long parallelogram using an air cylinder 19 while compressing a compression spring 18. It has moved to a position closer to tail 9. Note that l indicates the tail width and L indicates the total width of the paper. Further, FIG. 5 shows a structure for rotating the tail guide 17, which has a plurality of blades 21, and is supported by bearings 22. It further includes a cover 24 that serves as a passage for air 23 that rotates the tail guide 17. In addition,
25 is an air cylinder.

Next, to explain the operation, the tail 9 sent from the front press is wrapped around the top roll 1 and is stripped off by the doctor 5. That is, in order to move this tail 9 to the dryer part, air is blown out from the nozzle of the carrier jet 10 to transfer the tail 9 to the dryer part.
Peel off the top rolls 1 to 9a.

Next, air is blown out from the air supply pipes 15a and 15b provided in the upper and lower shutters 14 and 14', and the tail 9 is connected to the dryer roll 4 and the canvas 8.
Put it in between. As a result, the tail 9 wraps around the dryer roll 4, is stripped off by the doctor 6, and falls as shown in 9b.

Next, air 23 is blown onto the blades 21 to rotate the tail guide 17. In this case, it is possible to rotate the rope 12 in accordance with the operating speed by adjusting the air pressure and amount of air, so even when the paper strength is weak, the rope 12 can be rotated efficiently.
It can be inserted into.

Here, air is supplied to the air cylinder 19, and the parallel link 20 is deformed from a vertically long parallelogram to a horizontally long parallelogram by compressing the compression spring 18, thereby moving the tail guide 17 from the rest position to feed the paper as shown by the two-dot chain line. The tail 9 is moved to the position and operated as described above to sandwich the tail 9 between the two ropes 12. At this time, the spring force of the compression spring 18 compressed by the parallel link 20 increases, so that the closer the tail guide 17 is to the tail 9, the slower the moving speed of the tail guide 17 becomes.

Next, the air supply to the air cylinder 19 is stopped and the air is exhausted. At the same time, air is supplied to the air cylinder 25 in order to separate the side rolls from the tail, and the upper shooter 14 is moved upward. In this case, the compression spring 18 effectively acts to accelerate the detachment speed. In addition, the blade 2 for rotating the tail guide
1 is installed above the shutter 14, so that the flow of air between the upper and lower shutters 14, 14' is not disturbed. Also tail guide 1
The rest position 7 is located above the shooter so it does not get in the way of the seat.

Next, referring to FIG. 6, it is preferable that the air used in this device be essential air, which is dehumidified and free of oil, and EAH in the figure indicates an essential air header. Further, necessary instrumentation parts include a pressure reducing valve 26 for determining air pressure and a switching valve 27 for switching air. The switching valve 27 may be a solenoid valve, a manual valve, or an air switching valve, but it is most desirable to use a solenoid valve in order to facilitate automatic paper feeding. In the figure, 28 is a stop valve, 29 is a filter, 30 is an oiler, 31 is a speed controller, 32 is a tail guide rotor, and 33 is a gauge.

7 and 8 show a configuration in which tail presence/absence detection devices are added to the doctor portions 5, 6 of the top roll 1 and the dryer roll 4.

First, in Figure 7, tail 9 at top roll 1
After detecting the presence or absence of the tail 9a by the limit switch 36 operated by the arm 35 which is moved by the tail 9a against the spring 34, air is sent to the carrier jet 10 and the tail 9a is stripped from the top roll 1.

Further, in FIG. 8, the presence or absence of the tail 9b in the dryer roll 4 is detected by the limit switch 39 operated by the arm 38 that moves against the spring 37 by the tail 9b, and if the tail 9b is not present, the air in the cylinder 19 is turned off. Discharge and upper shutter 14
to retreat. By adding the above-described devices shown in FIGS. 7 and 8, it is possible to automate the paper passing operation and further save labor.

As explained in detail above, in the present invention, the tail is sandwiched between the upper and lower shutters, so that the tail is stably sent to the dryer part. Additionally, all air supply and exhaust can be done remotely, freeing workers from dangerous work.

In addition, in the present invention, a rotatable tail guide is pivotally attached to the upper and lower sides of the parallel link and hangs down, and an air cylinder on the upper part transforms the parallel link from a vertically long parallelogram into a horizontally long parallelogram with a compression spring. By deforming while compressing, it moves from the rest position to the paper passing position and approaches the tail, so the closer the tail is to the tail, the more the spring force of the compression spring increases, so the moving speed of the tail guide is It becomes loose and has a soft touch when it comes into contact with weak paper paper, thereby avoiding the risk of paper tearing. Further, after the tail is caught in the rope, the tail guide quickly separates from the tail via the parallel link due to the restoring force of the compression spring, thereby reducing the influence on the tail as much as possible.

[Brief explanation of the drawing]

Fig. 1 is a side view showing an example of a conventional paper machine paper passing device, Fig. 2 is a side view of a paper machine paper passing device showing an embodiment of the present invention, and Fig. 3 is a tail width adjustment in Fig. 2. A side view of the device, FIG. 4 is an enlarged view of the Z arrow in FIG. 2, FIG. 5 is a detailed partial cross-sectional view of the tail guide in FIG. 3, FIG. 6 is an air system diagram in FIG. 2, and FIG. 7 and FIG. 8 are side views of a tail presence/absence detecting device added to the doctor portion of the top roll and dryer roll shown in FIG. 2, respectively. Explanation of the main parts of the diagram, 1... Top roll, 3
...Press part paper roll, 4...Dryer roll, 5...Doctor, 6...Doctor, 8
...Canvas, 9,9a,9b...Tail, 1
0...carrier jet, 12...rope, 14...
...Upper chute plate, 14'...Lower chute plate,
15a, 15b...Air blow-off pipe, 16...Tail width device, 17...Tail guide, 18...Compression spring, 19...Air cylinder, 20...Link.

Claims (1)

[Scope of utility model registration request] In a paper passing device that strips the tail from a presto roll and inserts the tail between the canvas and the dryer roll, two chute plates are provided, each having a plurality of air blowing pipes, each holding the tail at the top and bottom. , the upper chute plate has a carrier jet with an air nozzle and a tail sweeper that moves between the rest position and the paper passing position, and the tail sweeper has a tail guide for pinching the tail between the ropes. , a compression spring, an air cylinder, and a parallel link, and the tail guide is rotatable and hangs down by pivoting on the upper and lower sides of the parallel link. A paper passing device for a paper machine, characterized in that it is configured to move from a rest position to a paper passing position and approach a tail by compressing and deforming a compression spring into a horizontally long parallelogram.